Lead-pencil sharpener.



PATENTED AUG. 4, 1908.

A. W. MUELLBR.

Nn En R. 'Aw HN sm Lu IY C mm Pn U DI Am EA cierran srrifrns ARTHUR' w. MUELLER LE AD-PE NCIL SHARPENER.

Applcat on led oveinber T o all whom. it may concern:

Be it known that I, ARTHUR W. MUELLER, a citizen of the United States, residing at Cincinnati, in the county of Hamilton'and State of Ohio, have invented certain new and useful Improvements in Lead-Pencil Sharpeners, of which the following is a specification.

It is the object of my invention to provide a. lead pencil sliaipeiier by means of which the pencil may be sharpened during its eniployment in writing oi' otliei' use of the pencil, and the invention consists in providing a pencil Sharpener constructed and arranged and rovided with attachments by means of whic i this may be accomplished, and in the construction, arrangement and combinations of parts hereinafter more fully described and claimed.

In the drawing: Figure 1 is a side elevation of my improved device having the outline of a hand shown in connection therewith to illustrate the manner of holding the same. Fig. 2 is a central longitudinal section of my improved device having the obstructing-bar broken away. Fig. 3 is a perspective view showing the parts of my improved device in separated relation. Fig. 4 is a detail in cioss-sectioii on a line corresponding to the line .fc-.7; of Fig. 2; and Fig. 5 is a side elevation of my improved device showing the same employed as a compass or divider.

1 represents the pencil of the general type of that which it is the object of my improved device to sharpen.

2 is a barrel in which a foi-rule 3 is adapted to freely rotate, the ferrule being limited in its longitudinal movement with relation to the barrel by providing the ferrule with ribs 4 received within ribs 5 of the barrel. The ferrule has clamping wings 6 and forms a clamp for the pencil.

7 is a knife-holder and is preferably in the form of a sleeve in which one or more knives 8 are suitably diagonally secured. The securing means for the knives may comprise wings 9 which are struck up and bent inwardly from the sleeve, to which wings the knives may be soldered. The sleeve extends above the feriiile and is preferably held against rotation with relation to the barrel while being permitted to be moved longitudinally thereof. as by means of a teat 10 which is struck inwardly from the barrel and received in a slot 11 in the sleeve.

12 is a rubber eraser at the upper end of Specication of Letters Patent.

,oF CINCINNATI, onto.

13, i901. seri-a1 No. 401,954.'

the barrel, a spring 13 being between the eraser andthe knife-holder for normally pressing the knife-holder toward the fcrnile. Washers 14 15 may be intel' )oscd respectively between the spring and tie eraser and betlie spring may readily exert its pressure evenly throughout the sleeve without danger of displacement of the sn'ing, for press'infr the knife or knives lengt iwisc of the )cnci which is firmly gripped in the pencil-clamp.

16 is an obstructing-bar which is secured to the barrel. I have shown this securing mea-ns as a band 17 received about the being soldered thereon. The bandhas lugs 1S between which the obstructing-bar 1s pivoted on a piiitle 19, This obstructingiar maybe jointed and have an extension 20 thereon and may. embody a {le-face 21. The extension may also be pointed at its end shown at 23 and be further provided with a cutting edge as shown at 24.

slippe( into the ferrule with its end against the knife or knives. One end of the pencil being sharpened it is ready for use. The end of the pencil not being used at the time is slipped through the ferrule and against the knife or knives, the pencil beiiwpushed inwardly, thereby pushing the I"knife-holder toward the cuttiiw end of the barrel, the disbeingr limited b v the tcat 1() and slot 11, the pencil being fili-.ily held in the fcrrule. A

Users of pencils have a tendency to unconscious-ly turn their pencils while writing or otherwise using the saine, and it ist-he object for shar enine the pencil. The pencil is held in t ie ort inaiy manner as indicated in Fig. 1 and the obstriictiiw bar is placed against the side of the hand in suitable position, for instance, adjacent the base of the thumb so as to prevent the barrel and the kiiife-liolder from turning. When the writer turns the pencil while writing or during pened will rotate across the knife or knives, the spring in the meantime forcing the sleeve and consequently the knife or knives downwardly against the pencil. These knives are placed at. an angle to the loiigitudinal axis of the barrel aiu encil, making a sheer cut. The downwarV movement 4of Parnr" citation.;A

M. A Patented Aug. 4, 1908.

tween the spring and knife-holder so thatk barrel and rigidly secured thereto as bytance to which the knife-holder is pushed of my invention to employ this movement" other use of the pencil, its end being shar.

as shown at 22 and have a. tapering end as In operation the pencil to be sharpened is w sof j the l-'nives continues as the iencil is cut away until the upper wall 0 the slot 11 strikes the teat 1 0, when the pencil will have been sharpened and further longitudinal movement of the sleeve will cease, the pencil in the meantime having been clamped in the ferrule so that the movement of the knives has taken place longitudinally of the encil for sharpening the same.

The extension 20 may be swung so as to bring its point downwardly, in which relation the holder with the pencil may 'oe used as a compass or divider. The tapering end 23 and the {ile-face 21 may also be employed for inanicuring purposes, and the extension for a letter o ener. Yhen used as a letter opener the oistructing-bar with its extension is swung upwardly.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is: i

1. A pene-il Sharpener comprising a barrel, a revoluble pencil-clamp therefor, a knifeholder longitudinally movable i n said barrel and limited in rotation with relation thereto, and a spring for urging said knife-holder toward said pencil-clamp, substantially as described.

2. A pencil sharpeiier comprising a barrel, an obstructing-bar thereon, a pencil-clamp rotatable with relation to said barrel, a knifeholder having movement longitudinally of said barrel and held against rotation with relation thereto, and a spring for pressing said knife-holder toward said pencil-clamp, substantially as described.

3. Iii a pencil Sharpener, the combination of a barrel, a rubber-eraser at one end thereof, a pencil-clamp rotatable with relation to said barrel at the other end of said barrel, a knife-holder and knife therefor in said barrel between said eraser and pencil-clamp, means for permitting longitudinal movement between said knife-holder and barrel and holding said knife-holder against rotation with rela-tion to said barrel, and a spring between said eraser and knife-holder for normally urging said knife-holder toward said pencilela-mp, substantially as described.

of a barrel, a pencil-clamp rotatable with i'elation thereto, a knife-holder in said barrel held aga-inst rotation and movable longitudinally of said barrel, spring for normally urging said knife-holder toward said pencilclamp, and an obstructing-bar secured to said barrel and arranged for contacting the hand of the user of the pencil for holdingsaid barrel against rotation and operating substantially as described.

5. In a pencil Sharpener, the combinationl of a barrel, a pencil-c amp rotatable with relation thereto, a knife-holder in said barrel held against rotation and movable loiigitudinally of said barrel, a spring for iiorinall urging said knife-holder toward said pcnei clamp, an obstructing-bar secured to said.A

barrel and arranged rfor contacting the hand of the user of the pencil for holding said barrel against rotation, said obstructing-bar having an extension pivoted thereto for permitting employment of said pencil Sharpener with its pencil as a compass, substantially as described.

6. In a pencil shar ener, the combination of a barrel, a pencil-c amp rotatable with relation thereto, a knife-holder in said barrel held against rotation and movable longitudinally of said barrel, a spring for norinall urging said knife-holder toward said pencil clamp, and an obstructing-bar secured to said barrel and arranged for contacting the hand of the usei of the pencil for holding said barrel against rotation, said obstructing-bar having an extension pivoted thereto for permitting employment of said pencil sharpener with its pencil as a compass, said extension having a taperinir end and fileface thereon, substantially as t escribed.

7. In a pencil shar iener, the combination of a barrel, a pencil-clam rotatable with relation thereto, a knife-ho der in said barrel held against rotation and movable longitudinally (if-said barrel, a spring for normally urging said knife-holder toward said peiici clamp, and an obstructing-bar secured to said barrel and arranged for contacting the hand of the user of the pencil for holding said barrel against rotation, said obstructing-bar having an extension pivoted thereto for permitting employment of said pencil Sharpener with its pencil as a com ass, said extension having a cutting edge t iereoii for employment of the saine as a letter opener, substantially as described. 4. In a pencil Sharpener, the combination In testimony whereof, I have subscribed my name hereto in the presence of two subscribing witnesses.

ARTHUR IV. MUELLER.

lllitiiesses:

FLORENCE QUiNN, SAMUEL B. IIAmiEL 

